Is Your GM Vehicle Running Rough, Stalling, or Showing a Check Engine Light?
If you’re dealing with baffling engine problems like erratic performance, a no-start condition, or persistent diagnostic trouble codes (DTCs), a failing Engine Control Module (ECM) is often the culprit. As a technician with over two decades of experience under the hood, I’ve seen how a faulty ECM can turn a reliable vehicle into a source of constant frustration. This isn’t just a part; it’s the central computer for your engine, and when it fails, nothing works right. This VIN-programmed ECM is the definitive solution to restore your vehicle’s performance and peace of mind.
The Right Part, Programmed Correctly, The First Time
Forget the hassle and high cost of a dealership visit for programming. We take care of the most critical step for you. When you order, you’ll provide us with your Vehicle Identification Number (VIN). We then flash this module with the latest, most stable software directly from GM, ensuring it is perfectly calibrated for your vehicle’s specific systems and options. It arrives at your door ready for installation and the final vehicle-side security handshake.
A Technician’s Real-World Experience
“A customer’s 2017 Sierra 1500 came into the shop last month with a persistent P0606 code (ECM/PCM Processor Fault) and an intermittent stall at idle. We checked all the basics—power, grounds, and wiring harnesses were all solid. The symptoms pointed directly to an internal failure in the original ECM. We installed one of these VIN-programmed modules, performed the quick theft deterrent relearn, and the truck ran perfectly. It’s a common failure point, and having a pre-programmed unit saved the customer hundreds in dealership fees and time.”
Simple Installation & Final Setup
Getting your vehicle back on the road is straightforward. While every model is slightly different, here is a general guide for replacing your ECM:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On most compatible vehicles like the 2017 Cadillac ATS, Silverado, or Tahoe, the ECM is found in the engine compartment, typically on the driver’s side.
- Disconnect Connectors: Carefully unlatch and remove the electrical harness connectors from the old module.
- Remove the Old Module: Unbolt the faulty ECM from its mounting bracket and remove it from the vehicle.
- Install the New Module: Bolt your new, VIN-programmed ECM into place and securely reconnect the electrical connectors. You should hear a click as they lock in.
- Reconnect Battery: Re-attach the negative battery terminal.
CRITICAL: Post-Installation Relearn Procedures
Because this module is programmed to your VIN, it must sync with your vehicle’s anti-theft system. This is a security feature present in all modern vehicles.
- ✔ Theft Deterrent Relearn: If the vehicle cranks but does not start after installation, a security relearn is required. This procedure is performed using a professional scan tool with access to GM’s Tis2web or Techline Connect software. This is a standard final step for this repair.
- ✔ Other Relearns: Depending on your vehicle, additional procedures like a Crankshaft Variation Relearn (CASE learn) or injector flow rate programming may be necessary to achieve optimal performance and clear certain codes. This is the responsibility of the installer.
Expert Pro Tip: Connector Inspection is Key
Before plugging in your new ECM, take 60 seconds to closely inspect the vehicle’s harness connectors. Look for any signs of green or white corrosion, bent pins, or damaged wire insulation. A poor connection can cause the exact same symptoms as a bad module. I recommend using a quality electronics-safe contact cleaner on the pins to ensure a perfect, trouble-free connection.
Direct Replacement for Multiple Part Numbers
This module is a direct, interchangeable replacement for the following GM part numbers: 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815.
Guaranteed Fitment for a Wide Range of GM Models:
This ECM is confirmed to fit the following vehicles, among others. Please verify your part number or contact us with your VIN to ensure compatibility.
- Cadillac ATS: 2017 (3.6L, VIN Y, LF4)
- Cadillac CTS: 2017 (6.2L Supercharged & 3.6L Twin Turbo)
- Cadillac Escalade / ESV: 2017
- Cadillac XTS: 2017 (3.6L, VIN 8, LF3)
- Chevrolet Corvette: 2017
- Chevrolet Silverado 1500: 2016, 2017, 2018
- Chevrolet Suburban 1500: 2017
- Chevrolet Tahoe: 2017
- GMC Sierra 1500 / Denali 1500: 2016, 2017, 2018
- GMC Yukon / Yukon XL 1500: 2017